Final answer:
The military-industrial complex was the group most resistant to Mikhail Gorbachev's reforms in the USSR, as these reforms threatened their power and the command economy system from which they benefited.
Step-by-step explanation:
Most Resistant Group to Gorbachev's Reforms:
The group that was most resistant to the changes Mikhail Gorbachev attempted to implement in the USSR was the military-industrial complex.In the period of Gorbachev's leadership, the Soviet Union experienced significant internal resistance to reforms. This was particularly evident during the attempted coup in August 1991 by conservative members of the Communist Party who were opposed to Gorbachev's policies of perestroika and glasnost. These policies aimed to restructure the political and economic system, but were seen as threatening to the entrenched interests of various powerful groups.
Among these groups, the military-industrial complex, which included high-ranking military officials and defense industry leaders, was highly resistant because the reforms threatened their status, power, and the command economy upon which they depended. Although other groups, such as factory managers and the national elites, also had reservations, it was the conservative faction within the Communist Party, intimately linked to the military-industrial complex, that took drastic action against Gorbachev's attempt to democratize and modernize the Soviet state.